Utils broken down into seperate files and exports

1 files changed, 19 insertions, 0 deletions

diff --git a/src/js/utils/loadImage.js b/src/js/utils/loadImage.js
new file mode 100644
index 00000000..8acd2496
--- /dev/null
+++ b/src/js/utils/loadImage.js
@@ -0,0 +1,19 @@
+// ==========================================================================
+// Load image avoiding xhr/fetch CORS issues
+// Server status can't be obtained this way unfortunately, so this uses "naturalWidth" to determine if the image has loaded
+// By default it checks if it is at least 1px, but you can add a second argument to change this
+// ==========================================================================
+
+export default function loadImage(src, minWidth = 1) {
+    return new Promise((resolve, reject) => {
+        const image = new Image();
+
+        const handler = () => {
+            delete image.onload;
+            delete image.onerror;
+            (image.naturalWidth >= minWidth ? resolve : reject)(image);
+        };
+
+        Object.assign(image, { onload: handler, onerror: handler, src });
+    });
+}